Pipe-threading tool.



G. E. JOSSELYN. PIPE THREADLNG TOOL. APPLICATION FILED 1 mm, 1914.

Patented Nov. 3, 1914.

2 SHEETS-SHEET 2.

n WASHINGTON. n. c

CHESTER E. JOSS ELYN, 0F BRIDGEPORT, CONNECTICUT.

PIPE-THREADING TOOL.

Specification of Letters Patent. Patented N0". 3, 1914.

Application filed February 3, 1914.. Serial No. 816,190.

provide a thread cutter with a practical and inexpensive means for adjusting the chasers or cutters so that the same may be made to serve for several different sizes of pipe,

further to arrange these cutters so that they will produce threads on a taper; and finally to generally improve upon the construction of cutting tools of the above class and particularly in the matter of the means for adjusting the cutters.

My invention may obviously be carried into effect with different forms of constructions and therefore I do not wish to be limited to the particular design or arrangement of mechanism shown in either of the accompanying drawings, since I believe it to be sufficiently broad in scope to cover the several constructions illustrated.

Upon the accompanying two sheets of drawings forming a part of this specification, similar characters of reference will be found to, designate like or corresponding parts throughout the several figures, and of which- Figure 1 shows a front elevation of a cutting tool including my improvement and having thread cutting dies mounted there in. Fig. 2 is a sectional elevation taken on line 22 of Fig. 1. Fig. 3 is a detail sec tional plan view of a part of both the stationary and. movable members of the cutting tool and showing the manner of operatively connecting the same together. Fig. t shows a detail plan view of a part of the cutting tool and illustrating the cutting die adjustable block in a different position. Fig. 5 shows a detached plan view of a slightly modified form of adjustin block. Fig. 6 shows still another form of adjusting block and, Fig. 7 shows a detail vertical sectional view of a further modification of the invens tion.

Referring in detail to the characters of reference marked upon the drawings 10 represents the stationary member of the tool and which is provided with a series of screws 11 to engage and secure the pipe to be cut, central therein.

The inner annular upper cylindrical edge portion of this stationary member is threaded to receive the threaded portion of the cylindrical rotatable member 12. Thismember 12 is so threaded as to form alead and.

serves to carry the series of threading dies 13 of which there maybe one or more, four being shown in the drawings. These dies fit in suitable guideways 14 formed in the face of the die holder 12 and are arranged radially withrespect to the center of the tool. The inner edge of these dies are obviously provided with a series of teeth to form thecutting edge for cutting threads on pipe, while the outer end is beveled to rest against the adjustable die blocks which serves to hold the several dies at a uniform distance from the center of the pipe. The

die holder 12 is provided with sockets1515 in each of which a handle 16 may be in serted for operating the cutting tool. A small spring 17 is seated in each of the sockets for the dies and serves to frictionally engage the under side of the dies in a way to hold them against accidental displacement.

An outer member 18 is rotatably mounted upon the fixed member 10 and serves to support the means for adjusting the several cutting dies as will again be referred to. An

annular groove 19 is formed in the peripheral surface of this member 10 and serves to receive a series of sectional guide plates 20 which for the purpose of assembling are first placed in the annular groove 21 of the member 18 and then shoved into the said groove 19 by means of radial screws 22.

Additional screws or pins 23 are arranged between the end portions of the said plates 7 20 and serve to separate the ends of the same and hold them in their proper and relative positions. This construction obviously permits the outer member 18 to be turned upon the fixed member. 10 and owing to the fact that the arms'for sockets 15 of the die and holder are fitted between U shaped pockets 24k in the said member 18 the latter is compelled to turn wit-h the [turning of the die holder 12. This outer member 18 while free to turn around on the fixed member 10 obthreaded.

as does the die holder 12. This further means that the die holder moves in and out with relation to the above parts 10 and 18 and thus permits the pipe to force the cutting dies 13 against the adjustable blocks 25.

The several dies 13 are free to be set in or out and as before stated may be made to serve for several sizes of pipe. This adjustment is accomplished by the formation of a series of separate and distinct or individually rotary adjusting blocks 25 which are arranged in the line of movement of the said dies and are provided with several operative faces each of which are at difierent distances from the pivotal center of the said block. These blocks are mounted to turn as for in stance upon pins 26 that are secured in the outer member 18 and are arranged at an acute angle with respect to the central axis of the tool holder or in other words with respect to the center of the pipe 27 to be The front ends of the said pins being nearer to this center line of the pipe than the bacir end thus throwing the blocks out of alinement with the pipe and forming inclined operative faces with respect to the said pipe. A spring actuated pin 28 is secured in the lower end of the pin sockets 29 and serves to engage in either of the cross slots 30 in the lower end of the pivotal pin 26 soas to hold the latter and its block against accidental movement and in the position to which they may have been adjusted. The block referred to is secured to the pin 26 in any suitable manner and in this connection it will be noted that the pin does not pass through the center of the block, but rather to one side and is arranged so that the several operative sides a, b, c and d are different distances from the center of the pin and to form back bearings for each of the dies, thus allowing the dies to occupy several different positions. As for instance as shown in Figs. 1 and 2 this block is so arranged as to hold the dies in their extreme inner position such as would be required to cut the threads upon a small size, say one inch pipe, while a quarter turn of the said block would allow the dies to be expanded to cut the threads upon a pipe a quarter of an inch larger. A further adjustment would provide for still another size and so on. In this respect it will be noted that owing to the fact that the pin 26 and its blocks are arranged at an acute angle with respect to the pipe the said dies are carried to open slightly as the thread is cut in upon the peripheral end of the pipe this forming what is known as a taper thread In connection with the foregoing feature I would also call attention to Fig. 7 wherein the pin 26 and the block contained thereon or for instance its rotating axis is shown as being arranged parallel with the pipe center and the faces of the adjustable block are beveled to afi'ord the relief for the threading dies and whereby the cutting of a taper thread may be effected in accordance with my invention in a slightly different manner.

The illustration shown in Figs. 5 and 6 serves to carry out the invention a bit further and shows a positive connection be tween the adjustable blocks and the threading dies. In these cases the outer ends 13 of the dies are cut to fit vertical or inclined guideways 31 in the several operative faces of the block 25* so that the said dies will be held more positively in engagement with the block and guided in their movements. In these instances, of course, the dies would have to be disconnected from the block before the latter could be rotated to effect the difi'erent adjustments.

Having thus described my invention what I claim and desire to secure by Letters Patout is:

1. In a thread cutting tool of the class described, the combination of a die holder, a series of dies mounted therein and arranged to be set to and from a common center an independently adjustable block for each of the said dies and having a series of bearing surfaces against either of which the said dies may be made to operate and in a manner to form adjustments for the said dies and means for supporting the said blocks so they may be rotated to bring their several bearing surfaces in engagement with the said dies.

2. In a thread cutting tool of the class described, the combination of a die holder, a series of dies mounted therein and arranged to be set to and from a common center, a series of independently rotary blocks each having a se ies of bearing surfaces against which the said dies may be set to operate and form adjustments for the said d es and means for supporting the said blocks so they may be rotated to bring their several bearing surfaces in engagement with the said dies.

3, In a thread cutting tool of the class described, the combination of a die holder, a series of dies mounted therein and arranged to be set to and from a common center,'an individual rotary member mounted in line with each of the said dies and having a series of operating bearing surfaces formed at a different distance from the axis of the member, and means for supporting the said members so they may be rotated to bring their several bearing surfaces in engagement with the said dies.

I In a thread cutting tool of the class described, the combination of a die holder, a series of dies mounted therein and ar-' ranged to be set to and from a common center, a series of independently rotary blocks each having a series of inclined bearing surfaces formed at a different distance from the axis of rotation of the block and against which the dies may be set and guided and means for supporting the said blocks so they may be rotated to bring their several bearing surfaces in engagement with the said dies.

5. In a thread cutting tool of the class described, the combination of a die holder, a series of dies mounted therein, an outer frame member, pins. mounted therein, a series of blocks rotatably mounted on the pins each having a series of bearing surfaces formed at a different distance from the axis of rotation of the block, means for moving the dies along the face of the blocks duringa threading operation, and means to allow the dies to move away from the tool center as a pipe is being threaded.

6. In a thread cutting tool of the class described, the combination of a pipe supporting member, a die holder rotatably mounted therein, a series of dies mounted in the holder and arranged to be set to and from a common center, an individual ad-v justable block for each of the said dies and having a series of bearin surfaces against either of which the said dies may be'made to operate, and means for moving the holder and dies in a manner to form a tapered head.

7 In a thread cutting tool of the class described, the combination of a pipe supporting member, a die holder threadably mounted in the supporting member, a series of dies mounted therein and arranged to be set to and from a common center, an outer member, a series of individual rotary blocks mounted in the outermember and each having aseries of bearing surfaces againstwhich the said dies may be set to operate and form adjustments for the, said dies.

Copies of this patent may be obtained for five cents each, by addressing ,8. In a thread cutting tool of the class described, the combination of a fixed member, a die holder rotatably mounted therein, a series of dies mounted therein, an outer frame member, a series of inclined pivotalpins mounted therein, a rotary block mounted on each of the pins and in line with each of the said dies and having a series of operating bearing surfaces to be engaged by and to support the dies at different distances from the tool center.

9. In a thread cutting tool of the class described, the combination of a rotary die holder, a series of dies mounted therein and arranged to be set to and from the center of the holder, a series of individual members each having a series of inclined bearing surfaces formed at a different distance from the axis of rotation of the member, and means to permit the members to set in diferent positions to bring any of the said bearing surfaces in position to support the dies.

I 10. In a thread cutting tool of the'class described, the combination of a die holder, a series of separate and distinct rotary blocks each having, a series ofbearing surfaces, a series of dies arranged in the die holder and engaging the surfaces of the blocks in a manner to be guided thereby and means for supporting the said blocks so there may be relative longitudinal movement between the blocks and the dies.

Signed at Bridgeport in the county of Fairfield and State of Connecticut this 2nd day of February A. D., 1914.

CHESTER E. J OSSELYN.

the Commissioner of Patents.

Washington, I). G.

It is hereby certified that in Letters Patent No. 1,115,831. granted November 3,

191 upon the application of Chester E. Josselyn, of Bridgeport, Connecticut,

for an improvement in Pipe-Threading Tools, errors appear in the printed specification requiring correction as follows: Page 8, line 30, for the Word head read thread; same page, second-mentioned witness to the signature of the patentee, for Ruth M. Norden read Ruth 1V. Worden; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Ofiice. I

Signed and sealed this 24th day of November, A. D., 1914.

R. F. WHITEHEAD,

[SEAL] Acting Uommisswner of Patents. 

